20522100621 has 16 divisors (see below), whose sum is σ = 31421399040. Its totient is φ = 11783023920.

The previous prime is 20522100593. The next prime is 20522100629. The reversal of 20522100621 is 12600122502.

It is a happy number.

It is not a de Polignac number, because 20522100621 - 2¹⁰ = 20522099597 is a prime.

It is a super-2 number, since 2×20522100621² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20522100629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16364685 + ... + 16365938.

It is an arithmetic number, because the mean of its divisors is an integer number (1963837440).

Almost surely, 2^20522100621 is an apocalyptic number.

It is an amenable number.

20522100621 is a deficient number, since it is larger than the sum of its proper divisors (10899298419).

20522100621 is a wasteful number, since it uses less digits than its factorization.

20522100621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32730656.

The product of its (nonzero) digits is 480, while the sum is 21.

The spelling of 20522100621 in words is "twenty billion, five hundred twenty-two million, one hundred thousand, six hundred twenty-one".